Albbet d



(No'Model.)

` A. D. DAVIS.

TUBULAP. BOILBR. No. 305,802. Patented Sept. 30,1884. l

-enoo To @ZZ whom t may concern:

NITED STATES PATEir inca ALBERT D. DAVIS, OF COLORADO SPRINGS, COLORADO.

TUBULARv BOILER.

SPECIFICATION forming part of Letters Patent No. 305,802, dated September 30, 1884.

Application filed February 20, 1884. (No model.) f

Be it known that l, ALBERT D. Davis, a citizen of the United States, residing at Colorado Springs, in the county of El Paso and State of Colorado, have invented a new and useful Improvement in Tubular Boilers, of which the following is a specification., refer ence being had to the accompanying drawings.

Figure l is a transverse vertical section of an upright tubular boiler in place in the fur nace embodying the improvements of my invention; and Fig. 2 is a horizontal section on the broken line in Fig. l. Fig. 3 is an elevation showing the exterior of the firebox, magazine, and steam-dome.

This invention has relation to upright tubular boilers; and it consists in the novel construction and arrangement of parts, as will be hereinafter fully` described, and particularly pointed out in the claim appended.

Referring by letter to the accompanying drawings, B designates the fire-box; F, the magazine provided with a door. H, through which the magazine is filled with coul.

A A designate tubular metal smoke-dues, which lead from the iireebox out through the top of the boiler, as shown. These dues A should be sufficient in number to nearly surround the magazine, but should not be employed where they will interfere with the doors of the magazine and fireboX.

E designates the steam-dome, and c c and c' c the brick flues,` which are separated by plates D D or brick-Work that can be carried over to the boiler-shell- The division-plates or brick-Work partition are provided with a smoke passage or opening, I), through which the smoke passes from the upper fines, c c, to the lower fines, c c.

The action of the lire is as follows First, it passes from the nre-box B through the submerged iiues A A, thence into the upper brick dues, e e, and nearly around the boiler, Where it dives down through the passage P into the lower brick ilues, d c', thence into the chimney. It will be seen that the metal lues A are completely submerged; or, in other Words, they are entirely surrounded by water. At the same time they are accessible for cleaning falls outside of the boiler. These lues Acarry the flame direct from the nre-box to the outer shell of the steam-dome.

For residence-heating this construction will be found to possess great advantages. There is no danger from fire; it requires little attention; may be easily and thoroughly cleaned. It is a base-burner, and, owing toits great heating-surface, economizes in fuel.

Having thusl fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a tubular boiler, the combination, with the boiler and steam-dome, of the submerged fire-box B, the submerged magazine located centrally above the steam dome, the submerged dues A, leading from the top of the nre-box through the top ofthe boiler at the base of the steam-dome, and the flues c c', surrounding t-he boiler and steam-dome, substantially as specified.

my own I have hereto affixed my signature in presence of two Witnesses.

ALBERT D. DAVIS.

Vitnesses:

A. DIXON, GEO. W. ZoLLnn.

lire-box and beneath the,

through the nre-box, so that all of the soot.

In testimony that I claim the foregoing as 

